Lester del Rey, Gust Gils, Nathalie Henneberg, John Ulrich Giesy, Junius B. Smith, Romain Yarov, Hugo Correa, Juliette Raabe, A. Dneprov, E. Parnov, M. Yemtsew, John R. Isaac, Alessandro Mussi, G. Altow], B. Sridhar Rao, M.D., Claus Felber